Selective Removal of Sulfate from Water by Precipitation with a Rigid Bis-amidinium Compound

Nikki A. Tzioumis; Duncan A. Cullen; Katrina A. Jolliffe; Nicholas G. White

doi:10.1002/anie.202218360

Selective Removal of Sulfate from Water by Precipitation with a Rigid Bis-amidinium Compound

Nikki A. Tzioumis, Duncan A. Cullen, Katrina A. Jolliffe^*, Nicholas G. White^*

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

13 Citations (Scopus)

Abstract

A simple, readily prepared biphenyl bis-amidinium compound (1⋅Cl₂) is able to selectively precipitate sulfate from water. The precipitant is effective at concentrations as low as 1 mM and shows complete selectivity against monovalent anions, and high selectivity even against CO₃²⁻ and HPO₄²⁻. It is highly effective (>90 % sulfate removed) in both seawater and highly acidic conditions relevant to mining waste-streams. X-ray crystallography reveals that 1⋅SO₄ forms a tightly packed, anhydrous, structure where each sulfate anion receives eight hydrogen bonds from amidinium N−H hydrogen bond donors.

Original language	English
Article number	e202218360
Journal	Angewandte Chemie - International Edition
Volume	62
Issue number	12
DOIs	https://doi.org/10.1002/anie.202218360
Publication status	Published - 13 Mar 2023

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title = "Selective Removal of Sulfate from Water by Precipitation with a Rigid Bis-amidinium Compound",

abstract = "A simple, readily prepared biphenyl bis-amidinium compound (1⋅Cl2) is able to selectively precipitate sulfate from water. The precipitant is effective at concentrations as low as 1 mM and shows complete selectivity against monovalent anions, and high selectivity even against CO32− and HPO42−. It is highly effective (>90 % sulfate removed) in both seawater and highly acidic conditions relevant to mining waste-streams. X-ray crystallography reveals that 1⋅SO4 forms a tightly packed, anhydrous, structure where each sulfate anion receives eight hydrogen bonds from amidinium N−H hydrogen bond donors.",

keywords = "Anions, Precipitation, Selectivity, Sulfate, Supramolecular Chemistry",

author = "Tzioumis, {Nikki A.} and Cullen, {Duncan A.} and Jolliffe, {Katrina A.} and White, {Nicholas G.}",

note = "Publisher Copyright: {\textcopyright} 2023 The Authors. Angewandte Chemie International Edition published by Wiley-VCH GmbH.",

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doi = "10.1002/anie.202218360",

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T1 - Selective Removal of Sulfate from Water by Precipitation with a Rigid Bis-amidinium Compound

AU - Tzioumis, Nikki A.

AU - Cullen, Duncan A.

AU - Jolliffe, Katrina A.

AU - White, Nicholas G.

PY - 2023/3/13

Y1 - 2023/3/13

N2 - A simple, readily prepared biphenyl bis-amidinium compound (1⋅Cl2) is able to selectively precipitate sulfate from water. The precipitant is effective at concentrations as low as 1 mM and shows complete selectivity against monovalent anions, and high selectivity even against CO32− and HPO42−. It is highly effective (>90 % sulfate removed) in both seawater and highly acidic conditions relevant to mining waste-streams. X-ray crystallography reveals that 1⋅SO4 forms a tightly packed, anhydrous, structure where each sulfate anion receives eight hydrogen bonds from amidinium N−H hydrogen bond donors.

AB - A simple, readily prepared biphenyl bis-amidinium compound (1⋅Cl2) is able to selectively precipitate sulfate from water. The precipitant is effective at concentrations as low as 1 mM and shows complete selectivity against monovalent anions, and high selectivity even against CO32− and HPO42−. It is highly effective (>90 % sulfate removed) in both seawater and highly acidic conditions relevant to mining waste-streams. X-ray crystallography reveals that 1⋅SO4 forms a tightly packed, anhydrous, structure where each sulfate anion receives eight hydrogen bonds from amidinium N−H hydrogen bond donors.

KW - Anions

KW - Precipitation

KW - Selectivity

KW - Sulfate

KW - Supramolecular Chemistry

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U2 - 10.1002/anie.202218360

DO - 10.1002/anie.202218360

M3 - Article

SN - 1433-7851

VL - 62

JO - Angewandte Chemie - International Edition

JF - Angewandte Chemie - International Edition

IS - 12

M1 - e202218360

ER -

Selective Removal of Sulfate from Water by Precipitation with a Rigid Bis-amidinium Compound

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